单项选择题
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
A.Heeling magnet
B.Flinders bar
C.Fore-and-aft magnets
D.All of the above can be set on magnetic east or magnetic west headings
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相关考题
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单项选择题
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
A.Quadrantal spheres
B.Heeling magnets
C.Flinders bar
D.Fore-and-aft magnets -
单项选择题
Which compensates for errors introduced when the vessel heels over（）.
A.The soft iron spheres on the arms of the binnacle
B.Magnets placed in trays inside the binnacle
C.A single vertical magnet beneath the compass
D.The Flinders bar -
单项选择题
When relieving the helm，the new helmsman should know the（）.
A.Course per magnetic steering compass
B.Gyro error
C.Variation
D.Maximum rudder angle previously used
